We were overly optimistic in adding all the Compliance Content and now have a mess of Server Properties, Extended Objects, and Component Templates that are cluttering up our BBSA system. Is there a removal process that can reverse the addition of that content so we can start fresh?

To delete the component templates and components easily, you can carete smart groiups based on the date the object was generated/changed or the role which creatd or changed. Once the smart group is populated you can delete the whole group.